If the primary food source for the whale population in an area is depleted which will most likely happen?

If the primary food source for the whale population in an area is depleted, the whales may face starvation, leading to a decline in their population. Additionally, they might migrate to other regions in search of food, which could disrupt local ecosystems and affect other marine species. Over time, this could result in the collapse of the local whale population and alter the dynamics of the marine environment.